I got the BATCH harness from allthingsbiothane.com. The woman who made it was very nice and it turned out absolutely beautiful!
I ordered it for Monty, but it's super adjustable and it fits Walter also, although there's a 40 lb. weight difference between them. When I got the harness out, Walter volunteered, so pics are of him.
Side view
Wow, that looks great on him! I have the Chest Easy on harness from the same website for my Malamute girl and it also fits my Saint Bernard. We love the stuff this lady makes!